The demo Songs are normally stored in User memory. If you don’t want those Songs, you can use the “Clear Song” Job on each Song. After doing that, the demos won’t be there on subsequent start-ups.

If you load or AutoLoad an “All” file that includes the demo Songs, they’ll be placed back in User memory. If you want to load such a file without the demo Songs, Clear the Songs and save a new “All” file for future use.